(1) The individual must be (a) unmarried, or (b) legally separated from his spouse under a decree of divorce or of separate maintenance, or (c) married, living apart from his spouse during the last six months of the taxable year, and maintaining as his home a household that constitutes the principal place of abode for a “qualifying child.”2 See Q 729 with respect to whom the individual is entitled to claim a deduction, and with respect to whom the taxpayer furnishes over one-half the cost of maintaining such household during the taxable year.3
(2) The individual must maintain as his home a household in which one or more of the following persons lives: (a) a qualifying child (if that individual is unmarried, it is not necessary that he have less than the personal exemption amount ($4,200 in 2019, $4,300 in 2020-2021, $4,400 in 2022, $4,700 in 2023, $5,000 in 2024 and $5,100 in 2025)4 of income or that the head-of-household furnish more than one-half his support; if the qualifying child is married, he must qualify as a dependent of the taxpayer claiming head-of-household status (or, would qualify except for the waiver of the exemption by the custodial parent (see Q 729)), or (b) any other person for whom the taxpayer can claim a dependency exemption (pre-2018) except a cousin or unrelated person living in the household.5 An exception to this rule is made with respect to a taxpayer’s dependent mother or father: so long as he maintains the household in which the dependent parent lives, it need not be his home.6
(3) The individual must contribute over one-half the cost of maintaining the home.8
(4) Taxpayer must not be a nonresident alien.9